{
  "id": "city-multiblade-duct-damper",
  "type": "model",
  "title": "外部連結ロッドと駆動部付きの多翼ダクトダンパー",
  "titleEn": "Multiblade duct damper with external linkage and actuator",
  "description": "矩形換気ダクトの途中に組み込む流量調整ダンパーの静的プロップ。両端が開いた短いケーシングと接続フランジ、部分開度で固定した4枚の厚い羽根、各羽根の貫通軸と軸受、外側クランクと共通連結ロッド、琥珀色の外部アクチュエーターを造形しています。静止ルーバーとは異なり連動羽根機構の外形を持ちますが、可動リグ、角度制御、気密遮断、空気流量、電気制御、防火・防煙性能や認証は付属しません。接続ダクトと吊り架台は別途配置してください。 ゲーム・可視化向け。製造・構造設計・3Dプリント用途は未検証。 外接寸法（X×Y×Z）1.296 × 1.105 × 0.486 m、8,388三角形。単位m・Y-up、水平中央の接地用原点、最下点Y=0。部品ごとの重複UV0と単色PBR材質を収録し、画像テクスチャ・UV2・コライダー・LOD・リグ・動作は付属しません。静的表示用でUnity/VRChat実機検証は未実施。STLはm・Y-up座標の形状のみで色・材質・UV・階層を含みません。",
  "descriptionEn": "A static airflow-control damper prop for installation within a rectangular ventilation duct, with an open-ended short casing and connecting flanges, four thick blades fixed partially open, through-shafts and bearings, exterior cranks and a common tie linkage, and an amber-covered external actuator. The linked-blade mechanism is structurally distinct from a static wall louver, but no movable rig, angle control, airtight shutoff, airflow, electrical control, fire/smoke performance or certification is supplied. Connecting ducts and suspension supports must be placed separately. For games and visualization; not validated for manufacture, structural engineering or 3D printing. Bounding dimensions (X×Y×Z): 1.296 × 1.105 × 0.486 m; 8,388 triangles. Metres, Y-up, horizontally centered placement origin with minimum Y=0, not an articulation or wall-mount pivot. Includes overlapping component UV0 and constant-color PBR materials, with no image textures, unique UV2, colliders, LOD, rig or runtime behavior. Static visualization only; Unity/VRChat editor and runtime tests have not been performed. STL uses metre-valued Y-up coordinates and contains geometry only, without color, materials, UVs or hierarchy.",
  "category": "urban",
  "tags": [
    "city",
    "street",
    "original",
    "ventilation",
    "duct-damper",
    "actuator",
    "ダンパー"
  ],
  "author": "Xenoah",
  "license": "CC-BY-4.0",
  "version": "1.0.0",
  "status": "public",
  "created": "2026-10-14",
  "updated": "2026-10-14",
  "thumbnail": "https://raw.githubusercontent.com/Xenoah/meshcopia/19446e7a974ccf0130721a39654cbf386a627b7d/content/assets/city-multiblade-duct-damper/preview.png",
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  "unit": "m",
  "upAxis": "Y",
  "triangles": 8388,
  "dimensions": [
    1.2965,
    1.105,
    0.486
  ],
  "uv": "Per-component primitive or automatically unwrapped UVs. Overlapping between components; not a packed unique lightmap atlas. Solid-color PBR materials; no external textures. STL has no colors or UVs.",
  "provenance": {
    "method": "Original AI-agent-authored procedural city geometry",
    "tool": "Blender 4.3.2; Meshcopia original city expansion generator 1.0",
    "rights": "Original geometry and material design created for Xenoah Meshcopia under the owner request for CC-BY-4.0 publication. No third-party meshes, scans, brands, logos or font files.",
    "generatorUrl": "https://github.com/Xenoah/meshcopia/blob/main/scripts/city_expansion/frozen/batch-024/scripts/city_expansion/ventilation_components.py",
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    "sourceRecipeSha256": "dc71fcae6b37e71ce00296d2dd56cbfd096e81cadc62a2c702ab271ed3759a25",
    "sourceHelpersSha256": "99ea76b4c3073b3ec2cfdf732e987c7977bfe5efc986b4a077df8db35a6f9d15",
    "alternateFormat": "STL triangulated from the exact reimported GLB, metre-valued Y-up coordinates. No printability or manufacture validation.",
    "stlSha256": "77ce40a1fe547fc8bbbe6565f9ef708775ea71ebbb317eafb531a4720a601a55"
  },
  "usages": [
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      "relationship": "original",
      "project": "Meshcopia",
      "sourceUrl": "https://github.com/Xenoah/meshcopia",
      "sourcePaths": [
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      ],
      "selectors": [
        "city-multiblade-duct-damper"
      ],
      "context": "Original city asset created for this library. No external deployment or reuse claimed."
    }
  ],
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  "manifestUrl": "https://xenoah.github.io/meshcopia/api/assets/city-multiblade-duct-damper.json",
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        "text": "Multiblade duct damper with external linkage and actuator by Xenoah / Meshcopia\nCopyright (c) 2026 Xenoah\nCC BY 4.0: https://creativecommons.org/licenses/by/4.0/\nSource: https://xenoah.github.io/meshcopia/assets/city-multiblade-duct-damper/\nProvided as-is, without warranties (license Section 5).\nChanges: none.\nAdditional changes: Converted unchanged source GLB geometry to FBX, with documented compatible material/texture derivatives.\n"
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}